On 24.10.2015 21:52, Don Brace wrote:
> Abandon and reschedule rescan process only if device inquiries
> fail due to mem alloc failures, which are likely to occur for
> all devices.
>
> Otherwise, skip device if inquiry fails for other reasons,
> and continue rescanning process for other devices.
>
> Reviewed-by: Scott Teel <scott.t...@pmcs.com>
> Reviewed-by: Justin Lindley <justin.lind...@pmcs.com>
> Reviewed-by: Kevin Barnett <kevin.barn...@pmcs.com>
> Signed-off-by: Don Brace <don.br...@pmcs.com>
> ---
> drivers/scsi/hpsa.c | 24 +++++++++++++++++++-----
> 1 file changed, 19 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
> index 5dfb6cf..e1ee06d 100644
> --- a/drivers/scsi/hpsa.c
> +++ b/drivers/scsi/hpsa.c
> @@ -3357,10 +3357,13 @@ static int hpsa_update_device_info(struct ctlr_info
> *h,
>
> unsigned char *inq_buff;
> unsigned char *obdr_sig;
> + int rc = 0;
>
> inq_buff = kzalloc(OBDR_TAPE_INQ_SIZE, GFP_KERNEL);
> - if (!inq_buff)
> + if (!inq_buff) {
> + rc = -ENOMEM;
> goto bail_out;
> + }
>
> /* Do an inquiry to the device to see what it is. */
> if (hpsa_scsi_do_inquiry(h, scsi3addr, 0, inq_buff,
> @@ -3368,6 +3371,7 @@ static int hpsa_update_device_info(struct ctlr_info *h,
> /* Inquiry failed (msg printed already) */
> dev_err(&h->pdev->dev,
> "hpsa_update_device_info: inquiry failed\n");
> + rc = 1;
> goto bail_out;
> }
>
> @@ -3417,7 +3421,7 @@ static int hpsa_update_device_info(struct ctlr_info *h,
>
> bail_out:
> kfree(inq_buff);
> - return 1;
> + return rc;
> }
>
> static void hpsa_update_device_supports_aborts(struct ctlr_info *h,
> @@ -3787,6 +3791,7 @@ static void hpsa_update_scsi_devices(struct ctlr_info
> *h, int hostno)
> n_ext_target_devs = 0;
> for (i = 0; i < nphysicals + nlogicals + 1; i++) {
> u8 *lunaddrbytes, is_OBDR = 0;
> + int rc = 0;
>
> /* Figure out where the LUN ID info is coming from */
> lunaddrbytes = figure_lunaddrbytes(h, raid_ctlr_position,
> @@ -3799,11 +3804,20 @@ static void hpsa_update_scsi_devices(struct ctlr_info
> *h, int hostno)
> continue;
>
> /* Get device type, vendor, model, device id */
> - if (hpsa_update_device_info(h, lunaddrbytes, tmpdevice,
> - &is_OBDR)) {
> + rc = hpsa_update_device_info(h, lunaddrbytes, tmpdevice,
> + &is_OBDR);
> + if (rc == -ENOMEM) {
> + dev_warn(&h->pdev->dev,
> + "Out of memory, rescan stopped.\n");
What about 'rescan deferred" instead of "rescan stopped?
> h->drv_req_rescan = 1;
> - continue; /* skip it if we can't talk to it. */
> + goto out;
> }
> + if (rc) {
> + dev_warn(&h->pdev->dev,
> + "Inquiry failed, skipping device.\n");
> + continue;
> + }
> +
> figure_bus_target_lun(h, lunaddrbytes, tmpdevice);
> hpsa_update_device_supports_aborts(h, tmpdevice, lunaddrbytes);
> this_device = currentsd[ncurrent];
>
> --
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